How Big Is The Universe? Astronomy Book for 6 Year Olds | Children's Astronomy Books , livre ebook
64
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English
Ebooks
2017
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64
pages
English
Ebooks
2017
Vous pourrez modifier la taille du texte de cet ouvrage
Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus
How Big Is The Univ erse?
Astronomy Book for 6 Year O lds Children's Astronomy B ooks
Speedy Publishing LLC
40 E. Main St. #1156
Newark, DE 19711
www.speedypublishing.com
Copyright 2017
All Rights reserved. No part of this book may be reproduced or used in any way or form or by any means whether electronic or mechanical, this means that you cannot record or photocopy any material ideas or tips that are provided in this book
I n this book, we're going to talk about the size of the universe. So, let's get right to it!
WHAT IS THE UNIVERSE?
T he universe is everything. It's all matter and all energy. It's all living things and all nonliving things. It includes light, space, and time as we know it. Before the universe came into existence, scientists believe that there was no matter, no energy, no space, and no time.
HISTORY OF BELIEFS ABOUT THE UNIVERSE
M ost early ideas about the universe had the Earth at its center. Some of the Ancient Greeks thought that the universe might go on forever and that it had always existed.
T hey pictured it as a group of spheres that held the stars, planets, and the Sun. In their pictures, these spheres always circled around the Earth, which was also shown as a sphere.
A s astronomers observed more and had a better concept of how gravity worked, a model with the Sun at its center was talked about. In 1543, the Polish astronomer Nicolaus Copernicus thought that the Sun was at the center and that the planets revolved around it. He published a book about his observations. This theory that the Sun was at the center was fought by the Catholic Church.
